X-ray diffraction and theoretical studies of the high-pressure structures and phase transitions in magnesium fluoride

2001 ◽  
Vol 64 (13) ◽  
Author(s):  
J. Haines ◽  
J. M. Léger ◽  
F. Gorelli ◽  
D. D. Klug ◽  
J. S. Tse ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Magnesium Fluoride ◽  
Theoretical Studies ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals X-ray Diffraction and Theoretical Studies of the High-Pressure Behavior of Magnesium Fluoride

2000 ◽  
Vol 56 (s1) ◽  
pp. s216-s216
Author(s):  
J. Haines ◽  
J. M. Léger ◽  
F. Gorelli ◽  
D. D. Klug ◽  
J. S. Tse ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnesium Fluoride ◽  
Theoretical Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pressure Behavior

Phase transitions in ReO3studied by high-pressure X-ray diffraction

2000 ◽  
Vol 33 (2) ◽  
pp. 279-284 ◽  
Author(s):  
J.-E. Jørgensen ◽  
J. Staun Olsen ◽  
L. Gerward
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Powder Diffraction ◽  
Ambient Pressure ◽  
Rhombohedral Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxygen Ions ◽  
Pressure Phase ◽  
Related Phase

ReO3has been studied at pressures up to 52 GPa by X-ray powder diffraction. The previously observed cubicIm3¯ high-pressure phase was shown to transform to a monoclinic MnF3-related phase at about 3 GPa. All patterns recorded above 12 GPa could be indexed on rhombohedral cells. The compressibility was observed to decrease abruptly at 38 GPa. It is therefore proposed that the oxygen ions are hexagonally close packed above this pressure, giving rise to two rhombohedral phases labelled I and II. The zero-pressure bulk moduliBoof the observed phases were determined and the rhombohedral phase II was found to have an extremely large value of 617 (10) GPa. It was found that ReO3transforms back to thePm3¯mphase found at ambient pressure.

High-Pressure Phase Transitions of Cubic Y 2 O 3 under High Pressures by In-situ Synchrotron X-Ray Diffraction

2019 ◽  
Vol 36 (4) ◽  
pp. 046103 ◽  
Author(s):  
Sheng Jiang ◽  
Jing Liu ◽  
Xiao-Dong Li ◽  
Yan-Chun Li ◽  
Shang-Ming He ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
High Pressures ◽  
High Pressure Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pressure Phase
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